Extend BoostFocus 1
Source Pathfinder Impossible Magic
Cast

You focus on the intricacies of the magic binding you to your eidolon to extend the duration of your boost eidolon or reinforce eidolon spell. If your next action is to cast Boost Eidolon or Reinforce Eidolon, attempt a skill check with the skill associated with the tradition of magic you gain from your eidolon (such as Nature for a primal eidolon). The DC is usually a standard-difficulty DC of your level, but the GM can assign a different DC based on the circumstances. The effect depends on the result of your check.
Critical Success The spell lasts 4 rounds.
Success The spell lasts 3 rounds.
Failure The spell lasts 1 round, but you don't spend the Focus Point for casting this spell.
Traits
Something of uncommon rarity requires special training or comes from a particular culture or part of the world. Some character choices give access to uncommon options, and the GM can choose to allow access for anyone. Less is known about uncommon creatures than common creatures. They typically can't be summoned. The DC of Recall Knowledge checks related to these creature is increased by 2.
ConcentrateAn action with this trait requires a degree of mental concentration and discipline.
FocusFocus spells are a special type of spell attained directly from a branch of study, from a deity, or from another specific source. You can learn focus spells only through special class features or feats, rather than choosing them from a spell list. Furthermore, you cast focus spells using a special pool of Focus Points—you can't prepare a focus spell in a spell slot or use your spell slots to cast focus spells; similarly, you can't spend your Focus Points to cast spells that aren't focus spells.
SpellshapeSpellshape actions tweak the properties of your spells. You must use a spellshape action directly before casting the spell you want to alter. If you use any action (including free actions and reactions) other than casting a spell directly after, you waste the benefits of the spellshape action. The benefit is also lost if your turn ends before you cast the spell. Any additional effects added by a spellshape action are part of the spell's effect, not of the spellshape action itself.
SummonerThis indicates abilities from the Summoner class.